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by Undo Capital
December 11, 2025
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What Is an Angel Investor?

An angel investor is a high-net-worth individual who invests their own capital into early-stage startups, often providing strategic guidance, industry connections and support alongside funding.

Angel Investor Meaning

The angel investor meaning centres on early belief and high-risk backing. Angels typically invest at the pre-seed or seed stage, helping founders validate their product, gain early traction and prepare for larger institutional rounds. A clear angel investor definition also includes their role in shaping a startup’s trajectory through mentorship, introductions and experience that accelerates growth.

For a practical look at early-stage fundraising and what angels expect from UK startups, read Undo Capital’s guide: Seed funding in the UK: What investors expect in 2025.

Disclosure Notice: This communication is issued by Undo Capital Limited (“Undo Capital”) and is provided strictly for informational purposes only. It contains general information and should not be relied upon as accounting, business, financial, investment, legal, tax, or other professional advice. Undo Capital is not regulated by the Financial Conduct Authority (FCA) and does not provide investment, financial, or tax advice. Our services are designed to assist startups and businesses with company formation, legal agreements, and funding-related documentation. Nothing in this communication constitutes, or should be construed as, a recommendation, offer, or solicitation to purchase or sell any security or financial instrument.
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Disclaimer: Our services are designed to assist startups and businesses with company formation, legal agreements, and funding-related documentation. We do not provide investment advice, financial advice, or tax advice, nor are we regulated by the Financial Conduct Authority (FCA). Participating in startups and early-stage enterprises carries inherent risks, including limited liquidity, absence of dividends, potential loss of investment, and dilution. Any decisions regarding investments should be made independently by the investor as part of a well-diversified portfolio.